broadband speaker 5gdsh-4-4. old speaker

radio antique soviet broadband paper stamped 5gdsh44 5gdsh woofer speaker vintage acoustics symphony old cases speakers retro 1960s 60s 70s helmholtz resonator threeway system fabric veneer plywood strut ussr recording studio sing art award speak play loft singer rap wooden classic varnished perforation musical interview commentator melody reggae mass media volume wave